no repl

[harcokuppens]

The online https://code.pybricks.com environment supports a repl for python.

I developed a repl in a python script at https://github.com/harcokuppens/repl_pybricks/ .
I also took the time to develop good handling of turning of the repl by pressing the button on the brick,
or for some cases the bluetooth connection brakes. ( eg. brick to far away).

I look at the source code of pybricksdev I learned how to implement the repl.
I think it also would be better for this repl to be integrated in pybricksdev. My intention was to make an implementation myself and do a pull request. However, I do not have the time to do this. Therefore I decided to make an issue instead.